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Choo Choo Chuga chuga when braking to a stop

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Old Jun 4, 2024 | 01:06 PM
  #1  
Extrafitkid's Avatar
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From: SW Florida
Car: 1986 TRANS AM
Engine: LB9
Transmission: 700R4
Choo Choo Chuga chuga when braking to a stop

Hello all,
Started to drive my 1986 TA after replacing tons of parts woman owner, I bought it had original everything, water pump leaking, Starter, Power steering pump, AC Compressor etc..

Anyway My Rotors "look" good, Brake shoes "look" thick, and new calipers but when I brake a feel this mild chugging or surging back and forth to a stop in the front its enough to notice. Anybody else had this?

"look" just mean "looks" not sure maybe disc warped?

Thank For Any Thoughts!

Last edited by Extrafitkid; Jun 4, 2024 at 01:11 PM.
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Old Jun 4, 2024 | 01:23 PM
  #2  
ShiftyCapone's Avatar
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: Choo Choo Chuga chuga when braking to a stop

Discs could be warped from a panic stop. It doesn't take much to overheat the stock brakes on these cars. You could take them to get turned but the stock rotors are cheap to replace anyways.

It would be a good time to check your brake hoses too. They may be swelling up if they are old.
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Old Jun 4, 2024 | 07:42 PM
  #3  
Extrafitkid's Avatar
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Joined: Apr 2024
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From: SW Florida
Car: 1986 TRANS AM
Engine: LB9
Transmission: 700R4
Re: Choo Choo Chuga chuga when braking to a stop

I Really Appreciate this Input from you helps to move forward !
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Old Jun 4, 2024 | 10:18 PM
  #4  
QwkTrip's Avatar
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: Choo Choo Chuga chuga when braking to a stop

The other thing that warps perfectly good discs is over torquing the wheel lug nuts.
When you see a mechanic grab that impact wrench....

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Old Jun 5, 2024 | 10:45 AM
  #5  
Beeman's Avatar
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Re: Choo Choo Chuga chuga when braking to a stop

You replaced tons of parts, did you replace any brake parts? Most blame the rotors without checking runout or checking thickness. Most do brake replacement and don't disassemble the caliper sliders and replace all of the hardware. It's an almost 40 yo old vehicle, everything is worn out.
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Old Jun 5, 2024 | 06:25 PM
  #6  
Extrafitkid's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2024
Posts: 95
Likes: 24
From: SW Florida
Car: 1986 TRANS AM
Engine: LB9
Transmission: 700R4
Re: Choo Choo Chuga chuga when braking to a stop

Pfft It not 40 yet it's only 38yrs old

They're fine ....

Chuckle Ya good point ....
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